Two hand lock



Nov. 3, 1931..

C. N. FAIRCHILD TWO-HAND LOCK Filed Feb. 18. 1928 2 Sheets-Sheer 1 Nov. 3, 1931. c. N. FAlRcHlLD 1,830,265

TWO-HAND LOCK Filed Feb. 18. 1928 2 Sheets-Sheet 2 @mum ZZ i6 Y z5 j; flaky@ W il l".114

. 45 absent-mindedly while driving.

- rammed f No'v. `e., i931- L crrAaLEs N. FAIRCHI'LD, or'.rnANrsvILLE.fcoNNnc'rIcUT, iissIGrNon| To FARCHILD f Loox CORPORATION, or PLANfrsvinLn,

" n. Ap/pne'atmn flied' February 1s, 192s. serial No. 255,440.

This 'invention relates. to automobile locks quent shuttingoff of the ignition, without the use of both of his hands',L thus materially Vre-' `ducingA if fnotelimi'nating"entirely the' acci dentl hazard cwhich might occur thru a 'joltlo ing or knocking orabsent-minded locking of thecarwhile' driving and in'which position on@ f the driveriShands would naturally be 'oilfthe when. f t n A further object 'of the 'invention is the 15 provision "of positive fmeans Afor controlling f theopening and closing of the ignitionvcir- Ycuit withoutl cooperationof the .locking bolt itself, 'the ignition "circuitbeing closed di.-

rectlyby'thecam fast tothe locking cylinder 20' andbeingraised by movement'of a rock shaft.

, Otherobjects oftheinvention relate more Y particularly'l to the forms and combinations of the various .parts,'"these objects being particularl'y set forth in the claims; 'Y VIn lcoincidental locks, particularlythose Y secured to the steeringposty casing so as to lockfthe steering wheel 'v from movement'por to render it entirely free,fthereis an acci-v v dent hazardQ-notgreatit isftrue, but neveri 30 thel'ess one that cannot be overlooke`d,occuring'rthru va driver-absentiinindedly locking the car against steering bythe 'hand that 1s not occupied bysteering.'V Usually the driver i has bot-h hands on ,the steering wheel but par- 35 y ticularly toward V'the V end' of ay long tiresome v trip one is prone to steer with just oneY hand andfunderjustV such conditions kan accident sometimes has occurred in theway indicated. *Iny the presentinventionjthe partsr` of vthe lock are so constituted and arranged that the locking bolt can be moved to position to lock the steering post onlyy by taking both hands olf the steering wheel,` andthis act'of lock. ing the' wheel can 'therefore never be done @In the drawings :Y-A v vFigure 1'is a side elevation. v Figure 2y is a top'plan view; Y

Figure 3is agsection taken on the broken GONNEcfrIcuT, A coRPoRATIoN orY DEM.-l

Figure 4 isa section taken on line Figure 3.

Figure 5 is elevation of the lower lporl tion of the housingr showing the connection with the housing cap.` Y V Figure 6 is a section thru the center line of the locking bolt but'at right angles tothe section shown in Figure 3. Y.

Figure 7 is a view similar to Figure 6 but showing the parts in the 360 position.' Figure 8`shows the manual leverin plan. Figure 9 shows a section thru the inner end of the rock shaft.

' Referring particularly to Figure 3 the lock barrel 20 is permanently secured to the hous- I ing 10 by the pin 11 shown in Figure 1, this pin also holding in place the lock case 12y which is suiiiciently long axially to leave a considerable space between the front end 14 of the look cylinder and the front face of the case 12. A slotted swivel 15'is free to revolve inthe ,front face of the case 12 but is ysecured to revolve with the lock barrel k16 -by means of the pin 17 seen in Figure 1. At

the rear the barrel, 16, which is concentric with the lock cylinder, has secured to it a cam 32'which engages ay transverse pin 23 permanently secured in the head ofthe locking bolt Proper rotation of the key 16a moves the cam' 22 so as to lift the locking bolt 25 against the springl 26 whichengages the head ofthe bolt 25 at one end and at the other end n yengages a disk 27 seated in a small shoulder 28 in the housing being held against this shoulder by ythe locking of the cartridge case 29 to the housing by means of the pin 30.

At the top of the housing is mounted a switchboX 31 preferably containing a pair of spring contact fingers 32 ina position to be bridged by a metalliccup 33 carried by but insulated from the stem 34 and having a head k35'between which'and the plate 27 is mounted a spring 36 serving normally to press the head 35 toward the head of the locking bolt.y In the down position of the stein shown in Figure 3 the follower 40, fast to the stem, rests upon the plate 27 and at the same time the washer 43 rests on the top surface 'of the housing 10, they spring 36 holding the parts 'in n this position.

y The'follower 40 has two dependent portions or legs, one of which, bearing the numeral 44,

see Figure, is shown as extending to theY levellof the bottom ofthe rock shaft 50 while fthe shorter leg 46 projects in Vaspace between the cartridge case 29 and the housing, Ythisl space being formed by slabbingoif a` portion of the case v29Jwhich is otherwise cylindrical. The edge of this slab is numbered '47,

c When the lock cylinder is turned byfmeans;y

of thekey 176a the'cam V22 engages the' pin 23 lifting theY locking bolt 25, Therarn 22` in turning approximately 180o from the-floclnidv position engages the lowerA tipofthe leg 4,6.. and lifts the stem 34 so'as to complete the cire cuit thru the twocontacts 32 thus'closing the circuit.v Y

The rock'shaft 50 is generally cylindrical but is cutaway as at ,51'in Figure 2 so as not to interferewith movement of kthe locking bolt when the locking bolt is in lockedposition as in all of the figures except Figure i' A flat metal handle 60 islfast to the rock shaft inFigure 7.

and operates it so 'as to bring the end of the rock shaft vinto position toi interfere with movement of the locking bolt as for example until its forward edge strikes against the edge of the slot in the housing. The handle has a laterally extendingshort lever arm 63 havingvat one yside .(the bottom sideas seenin Figure 8) a face 64 vandat'the othe'r'side' a shoulder 65'the active edge or face of which'is at right angles to the side or face 64 ofthe lever arm. The handleory lever 60 is permanently .secured to the rock shaft.

Having particular reference tor Figures 6 vand 7 it will be seen that in the locked position'shown in the former figure the rock shaft 50 is so positioned that its cutaway portion 51 permits `Vfree movement of the locking bolt Y but the rock shaft is free to turn, as far the bolt is concerned, in this position for the/bolt is cut away as at 70. In Figure 7 however,

the turning of the rock shaft 50 engages va shoulder 71 at the top ofra groove '.73 in the bolt and prevents adownward movement of,

the locking Vbolt to locked position.

The operation ofthe device is as follows: Assuming the parts'to be in locked position, the key 16a is inserted thru the. slot in the swivel 15 which isalways in alinement with the lock cylinder which latter in they form illustrated is concentric with the lockV barrel andwith the lockbarrel case 1 2. Thereis no obstruction to the insertion of the key, neitherV venting its beingy driven. Y

Consequently to lock the car from running of its spring 26 thereby freeing tlie'steering tube 75'from thesteering-tube casing 76, and further rotation ofthe cam 22 has caused contact with the'shorter leg 46 of the follower l40raising the stem 34 and causing the cup '32 to Vclose the ignition circuit either 'synkclnoneously with ,or slightly after` the 'unlocking-of the steering tube.

Thus in running positionfthebolt iswithi drawn, the( stemis in its uppermost position closing the ignition circuit, the frock shaft is heldby the spring-62 .so as nottO inter-` fererwith movement ofthe bolt and while the key'is free to turn backward 4in acounter clockwise direction from running position la l limited extentto breakv the ignition circuit,

it is not free-to-move forward kbecause of the f engagement of the key with the shoulder 65 and the impossibility of lmoving the handle or lever so asto permit, further vmovement of .the key. The driver may turnthe key backward a suiiicient'amount lto vbreak thevignition circuit but he cannot permit-or cause the bolt to move to locking" positionby vfurther continued movement of the key alone.

It is quite advantageous to permit the driver athis own discretion to make and break the ignition circuit at will but it is also important that the drivernot be permitted to break the ignition circuitl and take the key out of the lock without first locking the'car and for this reason the construction of the cam is so' made as to prevent backward movement of the key and lock 4cylinder from runningy position to the 180"A position at which the key can be removed, leaving the parts in the so-called third position with the car unlocked and the ignitionl oft vto permitready moving of the caras for example, in lshipping,while preposition at 320- the driver must first back the key a slight amount soas to free,l the lever which thenmaybeturned to the right and held against its spring while thevkey is turned to the 360 position where it is stopped by engagement of the key with the face 64.-` A lin this .360 position, which is shownin Figure 7, the ignition circuit is closed, the locking lbolt is up, the rock shaft-is turned sofas to hold the locking bolt against its spring and also to hold the ignition cup stem 34 elevated by contact between. the rock shaft andthe longer leg 44 of the/follower. The key 4in the 360Oposition-can be removed, or ,it can be moved back,becausejwatrthis time -therock j rockthe shaft and its lever sothat instantly A,

Y, disabling the steering mechanism, of means including amanually operated device for shaft is holding the boltin a positionwhere locking bolt when freed of the rock shaft and by the wedging action ofthe boltagainst the edge of the rock shaft the spring 26 tends to uponV withdrawal 'of the key the locking bolt is shot to locking position and the iginition circuit broken simultaneously therewith. Since it is absolutely impossible for a driverl tov take any action absent-mindedly while both hands are off the steering wheel and the automobile is being driven, all possibility of an inadvertent Llocking of the car while in motion is prevented as the lock can only be operated when the driver has both hands free,

' in other words whenthe car is still.

What I claim is: l. In a device to preventaccidental locking of the steering mechanism of a moving autoof the automobile: the combination-with steering mechanism and av locking bolt for moving the locking bolt from driving to locking` position and vice versa, and means which V"must be manually moved simultaneously With themovement of said device in order to move the bolt from driving position to locked position, 'said two meansbeing'so located that the driver must take both of his hands from the driving wheel in order to placetlie auto- Y ,mobile in locked position.`

' pressed to position to break the ignition circuit and a single means for simultaneously engaging the bolt and the make and break 1 mechanism, independently 'holdingv the boltl against its yspring-and `the ignition circuit make and breakmechanism against its spring.

3. In a coincidental lock, a circuit maker to move it to` unlocked position, andl engaging the-circuit maker and breaker to move it in the same direction as the bolt to circuit closing position. i Y` 4. The device of claim 3 plus a rock shaft movable to position to hold the bolt and the circuit maker and breaker in the position to which they are moved by the cam irrespective of further movement of the cam.

mechanism including a cam for moving the bolt to unlocked position and the circuit maker and breaker to closed position, a rock shaft, and a manually operated means blocky position until therock shaft is moved to position to hold the bolt in unlocked position and the circuit maker and breaker in closed position, said manually operated means `being so located with respect to the key that vthe V use of both-,hands ofthe driver is required to move the rock shaft to bolt retaining position.

'members normally while his left hand oper-y mobile thru'ina'dvertent action of the driver ates the other-member, whereby the driver .must removeb'oth of his hands from the steer- `the automobile of a theft preventing mechanism: the combination with a theft preventing device, of means for operating said device, which means includes two independently operated members which must be manually handled simultaneously in order to movethe theft preventing device from passive or driving position to active or theft preventing position, said members being so located with respect to each other as to require the driver to use his right hand to operate one of the members normally while his left hand bolt, one of the members is a key operated locking cylinder having a cam to engage the .bolt to raise it against its spring and the second members includes a rock shaft which engages the bolt to hold it out of locking position irrespective of the action of the cam.

In testimony whereof I aflix my signature. i'

CHARLES N. FAIRCI-IILD.y

ingY the movement of the key beyond running f i 6. In a device for preventingaccidental dis-c l c t c l v Voperates the other member, whereby the i and breaker, a bolt, a cam engaging the bolt f iso 

